Patent US3750033A successfully refreshed from Google Patents.
US3750033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for receiving one of particular control signals preceded by a common start signal under protection against static noise
Assignee: Individual
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Filing: 1971-08-10
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Granted: 1973-07-31
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Expires: 1991-08-10
Abstract
Abstract A system for receiving a control signal formed in sequence by a common start signal and one of particular control signals by the use of a first decision circuit for detecting the common start signal and a second decision circuit operational after the first decision circuit receives the common start signal, in which a third decision circuit responsive to a statice noise component included in the control signal is provided in parallel with the second decision circuit so that the particular detection of the control signal can be performed in disregard of static noise in a fail-safe manner.
Inventors
- 👤 M Fukata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:15
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/53; H04H20/59; G; G08; G08B; G08B27/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A system for receiving one of particular control signals immediately preceding by a common start signal under protection against static noise, comprising: receiving means for receiving from a transmission medium an input signal formed by the common start signal and said one of particular control signal; a first gate operatively coupled to the receiving means; first decision means connected to the receiving means and the first gate for gating the first gate in response to the common start signal: control switch means connected to a control object for controlling the controlled object; second decision means connected to the first gate and the control switch means for switching the control switch means in response to one of particular control signals which is passed through the opened first gate; third decision means connected to the first gate and the control switch means so as to be in parallel with the second decision means for switching the control switch means in response to static noise caused at the same time as said one of particular control signal.
Claim 2
Independent Claim
174 words
A system for receiving one of particular control signals immediately preceding by a common start signal under protection against static noise, comprising: receiving means for receiving from a transmission medium an input signal formed by the common start signal and said one of particular control signal; a first gate operatively coupled to the receiving means; first decision means connected to the receiving means and the first gate for gating the first gate in response to the common start signal: control switch means connected to a control object for controlling the controlled object; second decision means connected to the first gate and the control switch means for switching the control switch means in response to one of particular control signals which is passed through the opened first gate; third decision means connected to the first gate and the control switch means so as to be in parallel with the second decision means for switching the control switch means in response to static noise caused at the same time as said one of particular control signal.
Claim 3
Dependent Claim
72 words
A system according to claim 1, in which the third decision means comprises a high-pass filter for selecting static noise components from the input signal, a rectifying circuit connected to the high-pass filter for rectifying the output of the high-pass filter, and a decision circuit connected to the rectifying circuit for generating a decision output to gate the control switch when the rectified output of the rectifying circuit exceeds a reference level.
Claim 4
Dependent Claim
33 words
A system according to claim 1, further comprises a timer for limiting an operational time of the third decision means during a constant time substantially equal to the duration of the particular signal.
Claim 5
Dependent Claim
20 words
A system according to claim 3, in which the timer is provided at the input of the third decision means.
Claim 6
Dependent Claim
21 words
A system according to claim 3, in which the timer is a time constant circuit provided in the third decision means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |